Preheat the oven to 180°C
Cream the butter, shortening and sugars.
Add the egg and Vanilla Extract
Add the sifted flour and baking soda
Fold in the chocolate bits and macadamia nuts
Place tablespoonfuls on greased oven tray and bake for 12 to 15 minutes. Leave on the tray for 10 minutes before placing on cake rack to cool.